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<blockquote data-quote="Nicky Tesla" data-source="post: 11172" data-attributes="member: 445"><p>1. I would say yes due to you having sockets on db2, but i would do the rcd test anyway because it is supplied by it. If it fails, and the rcd is not required on db2, the findings can be noted on any cert for your work on db2. In the 17th any unprotected cables in walls etc req rcd protection, if not in a supervised location, so this needs to be considered.</p><p></p><p>2.If this is a TNC-s or TN-S system, the Zs is required to be low enough to comply with the mcb requirements. Using the type C requires a lower Zs.</p><p></p><p>3.The 20A type B would trip instantaneously at 5x20A=100A and the 16A type C would trip at 10x16=160A, so this shows that the 20A MCB would trip first.</p><p></p><p>Also is there only one MCB on DB2?</p></blockquote><p></p>
[QUOTE="Nicky Tesla, post: 11172, member: 445"] 1. I would say yes due to you having sockets on db2, but i would do the rcd test anyway because it is supplied by it. If it fails, and the rcd is not required on db2, the findings can be noted on any cert for your work on db2. In the 17th any unprotected cables in walls etc req rcd protection, if not in a supervised location, so this needs to be considered. 2.If this is a TNC-s or TN-S system, the Zs is required to be low enough to comply with the mcb requirements. Using the type C requires a lower Zs. 3.The 20A type B would trip instantaneously at 5x20A=100A and the 16A type C would trip at 10x16=160A, so this shows that the 20A MCB would trip first. Also is there only one MCB on DB2? [/QUOTE]
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